Biduri, Calotropis gigantea [Willd.] Dryand.ex WTAit commonly found in dry meadows, mountain slopes are low, and sandy beaches. Shrubs erect, height 0.5 to 3 m. Stem round, thick, thick-haired young twigs white. Leaves single, short-stemmed, the location of face. Leaves egg-shaped or oval, 8-30 cm long, 4-15 cm wide, light green. If one of the plants were wounded, will issue a white sap, watery, bitter taste and chocolate, over time was sweet, strong odor, and toxic. Biduri bark, Calotropis gigantea [Willd.] Dryand.ex WTAit fiber contain ingredients that can be used to make nets. Biduri can be propagated by seed
The roots contain saponin, sapogenin, kalotropin, kalotoksin, uskarin, kalaktin, gigantin, and Harsha. The leaves contain saponin, flavonoida, polyphenols, tannins, and calcium oxalate. Trunk contains tannins, saponins, and calcium oxalate. The sap contains a heart that resembles digitalis toxicity.
Root bark Biduri kolagoga efficacious, stimulating vomiting (emetic), stimulate the digestive enzyme (alternative), and laxative urine (diuretic). Bark Biduri efficacious emetic, efficacious tonic rate, and increase appetite. Rubifasien nutritious leaves and eliminate itching. Sap poisonous and can cause vomiting. However, efficacious as laxatives.